Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 12,981	$ 3,605
State and local	2,138	2,793	355
Foreign	1,315	1,194	1,348
Total current provision	16,434	7,592	1,703
Deferred:
Federal	8,951	20,531	14,494
State and local	1,238	2,890	3,170
Foreign	(6)	16	115
Total deferred provision	10,183	23,437	17,779
Provision for income taxes	$ 26,617	$ 31,029	$ 19,482